Explanation:

Still in the stage of development, local flexibility markets for electricity will enable distributed energy resources (short DER, e.g. storage operators, demand response actors, electric vehicles, end users, (renewable) power plants) to provide their flexibility in electricity demand or production/feed-in for the system operator or another counterparty at a local level. As there are different purposes for the use of this flexibility (market oriented, system oriented, grid oriented, see "flexibility triangle", there exist a variety of different market designs, comprising different actors and role models. Several local market models aim to efficiently tackle the widespread issue of grid congestion.
A flexible market offering includes the product and service elements valued by all segment members and options for an extra charge valued by some segment members. For instance, a certain airline offers a seat, snacks, water, and juice for all economy passengers, but it charges additional costs for earphones and alcoholic beverages.